期刊：
Journal of the Franklin Institute,2025年362(1):107397 ISSN：0016-0032
通讯作者：
Wang, H
作者机构：
[Nie, Liang] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Wang, Hui] Liaocheng Univ, Sch Math Sci, Liaocheng 252000, Peoples R China.;[Sun, Yichong] Chinese Univ Hong Kong, Multiscale Med Robot Ctr, Hong Kong 999077, Peoples R China.
通讯机构：
[Wang, H ] L;Liaocheng Univ, Sch Math Sci, Liaocheng 252000, Peoples R China.
摘要：
In this paper, a switched linear parameter-varying (LPV) resilient tracking controller is designed for rigid-body under actuator faults, uncertainties in measurement of scheduling parameters and time-delay in detection of system modes. The nonlinear attitude dynamics of rigid-body is constructed as a switched LPV system in which persistent dwell-time switching rule is used to regulate the switches caused by abrupt and intermittent actuator failures. Thereafter, by constructing a class of both parameter-dependent and time-dependent multiple Lyapunov functions (MLFs), a switched LPV resilient tracking controller is developed in order that the global uniform exponential stability and desired L∞ performance of the underlying system are achieved even with uncertain scheduling parameters, mismatched modes and persistent external disturbances. Furthermore, the nonconvex conditions of control synthesis are converted into parameterized linear matrix inequalities that can be readily resolved via gridding technique. Finally, the availability of the provided approach is evaluated with a numerical simulation.
In this paper, a switched linear parameter-varying (LPV) resilient tracking controller is designed for rigid-body under actuator faults, uncertainties in measurement of scheduling parameters and time-delay in detection of system modes. The nonlinear attitude dynamics of rigid-body is constructed as a switched LPV system in which persistent dwell-time switching rule is used to regulate the switches caused by abrupt and intermittent actuator failures. Thereafter, by constructing a class of both parameter-dependent and time-dependent multiple Lyapunov functions (MLFs), a switched LPV resilient tracking controller is developed in order that the global uniform exponential stability and desired L∞ performance of the underlying system are achieved even with uncertain scheduling parameters, mismatched modes and persistent external disturbances. Furthermore, the nonconvex conditions of control synthesis are converted into parameterized linear matrix inequalities that can be readily resolved via gridding technique. Finally, the availability of the provided approach is evaluated with a numerical simulation.
摘要：
Multimodal medical image fusion aims to integrate complementary information from different modalities of medical images. Deep learning methods, especially recent vision Transformers, have effectively improved image fusion performance. However, there are limitations for Transformers in image fusion, such as lacks of local feature extraction and cross-modal feature interaction, resulting in insufficient multimodal feature extraction and integration. In addition, the computational cost of Transformers is higher. To address these challenges, in this work, we develop an adaptive cross-modal fusion strategy for unsupervised multimodal medical image fusion. Specifically, we propose a novel lightweight cross Transformer based on cross multi-axis attention mechanism. It includes cross-window attention and cross-grid attention to mine and integrate both local and global interactions of multimodal features. The cross Transformer is further guided by a spatial adaptation fusion module, which allows the model to focus on the most relevant information. Moreover, we design a special feature extraction module that combines multiple gradient residual dense convolutional and Transformer layers to obtain local features from coarse to fine and capture global features. The proposed strategy significantly boosts the fusion performance while minimizing computational costs. Extensive experiments, including clinical brain tumor image fusion, have shown that our model can achieve clearer texture details and better visual quality than other state-of-the-art fusion methods.
作者机构：
[Yang, Bin; Tan, Binxi] Univ South China, Coll Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Yang, B ] U;Univ South China, Coll Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Transformer;deep learning;image fusion;infrared image;multiscale features
摘要：
The aim of infrared and visible image fusion is to produce a composite image that can highlight the infrared targets and maintain plentiful detailed textures simultaneously. Despite the promising fusion performance of current deep-learning-based algorithms, most fusion algorithms highly depend on convolution operations, which limits their capability to represent long-range contextual information. To overcome this challenge, we design a novel infrared and visible image fusion network based on Res2Net and multiscale Transformer, called RMTFuse. Specifically, we devise a local feature extraction module based on Res2Net (LFE-RN) in which dense connections are adopted to reuse the information that might be lost in convolution operation and a global feature extraction module based on multiscale Transformer (GFE-MT) which is composed of a Transformer module and a global feature integration module (GFIM). The Transformer module extracts the coarse-to-fine semantic features of the source images, while GFIM is used to further aggregate the hierarchical features to strengthen contextual feature representations. Furthermore, we employ the pre-trained VGG-16 network to compute the loss of features with different depths. Massive experiments on mainstream datasets indicate that RMTFuse is superior to the state-of-the-art methods in both subjective and objective assessments.
期刊：
Chemical Engineering Journal,2025年511:161865 ISSN：1385-8947
通讯作者：
Wang, XZ;Tang, ZG
作者机构：
[Wang, Xingzhu; Wang, XZ; Sheng, Yifa; Xu, Guoqiang; Zheng, Xiaojian] Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Hunan, Peoples R China.;[Wang, Xingzhu; Wang, XZ; Sheng, Yifa; Xu, Guoqiang; Zheng, Xiaojian] Univ South China, Sch Elect Engn, Hengyang 421001, Hunan, Peoples R China.;[You, Peng; Zhang, Yu; Su, Yaorong; Xin, Min; Han, Peigang; Tang, ZG; Wang, Junyu; Tang, Zeguo; Xu, Guoqiang; Zheng, Xiaojian; Li, Jiahao; Khan, Danish; Gao, Huaxi; Yang, Fan; Lu, Di; Tang, Jun] Shenzhen Technol Univ, Coll New Mat & New Energies, Lantian Rd 3002, Shenzhen 518118, Peoples R China.;[Muhammad, Imran] Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China.;[Ahmed, Shehzad] Shanghai Jiao Tong Univ, China UK Low Carbon Coll, Shanghai 201306, Peoples R China.
通讯机构：
[Wang, XZ ] U;[Tang, ZG ] S;Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Sch Elect Engn, Hengyang 421001, Hunan, Peoples R China.;Shenzhen Technol Univ, Coll New Mat & New Energies, Lantian Rd 3002, Shenzhen 518118, Peoples R China.
关键词：
Dipole moment;Upper interface;Bi-molecular host-guest strategy;Inverted perovskite solar cells
摘要：
Due to the ease of chemisorption of self-assembled molecules on metal oxides, the dipole generation significantly minimizes interface recombination and improves hole extraction at the buried interface in inverted perovskite solar cells. By applying the same technique to the surface of perovskite films to enhance electron extraction and transportation properties, benzamidines are assembled on the surface of perovskite films via a unique host–guest strategy in this study. The ammonium cation, as a guest, interlocks itself in the crown ether’s cavity at the crown ether-treated perovskite films. Experimental characterizations and theoretical analyses show that this tightly bound interlocking self-assembles the benzamidine and creates dipole at the perovskite surface, facilitating electron extraction and preventing hole recombination. Consequently, it reduces the perovskite’s work function, thus establishing minimal photovoltage and filling factor losses with an efficiency of 25.19%. As analyzed via different theoretical calculations, the strength of this host–guest interlocking even stayed effective in the aqueous solution. Furthermore, the modified devices showed long-term stability under high humidity conditions due to host–guest films’ high hydrophobicity.
Due to the ease of chemisorption of self-assembled molecules on metal oxides, the dipole generation significantly minimizes interface recombination and improves hole extraction at the buried interface in inverted perovskite solar cells. By applying the same technique to the surface of perovskite films to enhance electron extraction and transportation properties, benzamidines are assembled on the surface of perovskite films via a unique host–guest strategy in this study. The ammonium cation, as a guest, interlocks itself in the crown ether’s cavity at the crown ether-treated perovskite films. Experimental characterizations and theoretical analyses show that this tightly bound interlocking self-assembles the benzamidine and creates dipole at the perovskite surface, facilitating electron extraction and preventing hole recombination. Consequently, it reduces the perovskite’s work function, thus establishing minimal photovoltage and filling factor losses with an efficiency of 25.19%. As analyzed via different theoretical calculations, the strength of this host–guest interlocking even stayed effective in the aqueous solution. Furthermore, the modified devices showed long-term stability under high humidity conditions due to host–guest films’ high hydrophobicity.
摘要：
In the emerging Web 3.0, origin-destination (OD) traffic maps play a crucial role in network maintenance and management. However, increasing network size and complexity, as well as insufficient or invalid NetFlow protocol-based measurements pose numerous challenges to recovering traffic maps for Web 3.0. This paper therefore proposes RNT-HTT, a robust Network Tomography model based on Hankel time-structured tensor, to accurately recover OD traffic maps with link loads and a fraction of NetFlow counts in Hankel tensor space. More specifically, we propose to Hankelize both OD traffic and link load matrices to three-way tensors along time direction, which fully exploits time-structured correlations concealed in network data. OD pairs-mode product is also designed to model the relation between the Hankelized OD traffic and link load tensors. On the basis of these, RNT-HTT formulates the recovery problem as a convex optimization program with tensor nuclear and ${{\ell }_{1}}$-norms to respectively effect traffic low-rank and noise sparsity characteristics. In addition, the block-iteration alternating direction method of multipliers (ADMM) and bidirectional pre-sampling schemes are developed to solve RNT-HTT reliably and efficiently. Extensive experiments on three real-world datasets verify effectiveness of RNT-HTT, and corroborate its superior performance over state-of-the-art methods in terms of the recovery accuracy.
摘要：
Avatar is one of the most intuitive central components in Metaverse and faces serious security problems, particularly during the interaction with each other. In this article, we consider the problem of timely detecting the stealthy anomaly in the avatar interaction, which is crucial for security and privacy in Metaverse. With this goal, a new tensor summary statistic is proposed first to well depict the statistical discrepancy between normal and anomalous interaction volume samples, even when anomalies are stealthy. The proposed tensor summary statistic is established from the tensor linear representation residual, which naturally implies the statistical probability that an interaction volume sample lies within or deviates from the tensor lateral space. Moreover, a convex optimization programme is introduced to robustly recover the tensor lateral space in the presence of anomalous samples, thereby enhancing the robustness of our tensor summary statistic. On the basis of the tensor summary statistic, a non-parametric statistic framework is developed for the real-time detection of the stealthy interaction volume anomaly. We also provide theoretical analysis concerning its detection performance and parameter selection. Extensive experiments using synthetic and real-world datasets verify our effectiveness and superiority. Compared with benchmark methods, the proposed detection scheme achieves significantly lower detection delay and higher false alarm period, particularly in the detection of stealthy anomalies with a low change rate.
期刊：
Nuclear Engineering and Design,2025年433:113872 ISSN：0029-5493
通讯作者：
Liu, HL
作者机构：
[Liu, Hongliang; Ouyang, Zigen; Liu, HL; Liu, Wangheng] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Zeng, Wenjie] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Liu, Hua] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Liu, HL ] U;Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
关键词：
Adaptive learning observer;Radial basis function neural networks;Fixed-time fault-tolerant control;Control rod drive mechanism faults;Load following for modular high-temperature;gas-cooled reactor
摘要：
Load following of the Modular High-Temperature Gas-Cooled Reactor (MHTGR) under Control Rod Drive Mechanism (CRDM) faults and disturbances remains a major challenge. This paper focuses on proposing a fixed-time fault-tolerant control method for this issue without considering the sensitivities associated with parameter setting. Firstly, to reconstruct some unmeasurable states of the MHTGR and the values of CRDM faults, an adaptive learning observer is established. Based on the learning characteristic of Radial Basis Function Neural Networks (RBFNN), the lumped uncertainties can be approximated. And then a fixed-time fault-tolerant controller is developed to ensure that the actual load output of the MHTGR actually tracks the expected output power within a fixed time, which can be determined through the system and controller parameters. Finally, simulations under two operational conditions demonstrate the control method is effective and feasible to the MHTGR system under disturbance and CRDM faults.
Load following of the Modular High-Temperature Gas-Cooled Reactor (MHTGR) under Control Rod Drive Mechanism (CRDM) faults and disturbances remains a major challenge. This paper focuses on proposing a fixed-time fault-tolerant control method for this issue without considering the sensitivities associated with parameter setting. Firstly, to reconstruct some unmeasurable states of the MHTGR and the values of CRDM faults, an adaptive learning observer is established. Based on the learning characteristic of Radial Basis Function Neural Networks (RBFNN), the lumped uncertainties can be approximated. And then a fixed-time fault-tolerant controller is developed to ensure that the actual load output of the MHTGR actually tracks the expected output power within a fixed time, which can be determined through the system and controller parameters. Finally, simulations under two operational conditions demonstrate the control method is effective and feasible to the MHTGR system under disturbance and CRDM faults.
作者机构：
[Peng, Wenbo; Xu, Baomin; He, Siru; Zhu, Peide; Wang, Xingzhu; Yuan, Huimin; Wang, XZ] Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Peng, Wenbo; Xu, Baomin; He, Siru; Zhu, Peide; Wang, Xingzhu; Yuan, Huimin; Wang, XZ] SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China.;[Chen, Yuejiao] Cent South Univ, State Key Lab Power Met, Changsha 410083, Peoples R China.;[Wang, Xingzhu; Wang, XZ] Shenzhen Putai Technol Co Ltd, Shenzhen 518110, Peoples R China.;[Wang, Xingzhu; Wang, XZ] Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Peoples R China.
通讯机构：
[Xu, BM ; Wang, XZ] D;[Wang, XZ ] S;Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China.;Shenzhen Putai Technol Co Ltd, Shenzhen 518110, Peoples R China.
关键词：
Nonflammable;Capsule-like solvation sheaths electrolyte;Anions-derived SEI;Lithium metal batteries
摘要：
The localized high-concentration electrolyte can be achieved by diluting a high-concentration electrolyte with an anti-solvent, which inherits the original solvation structural characteristics and reduces harmful interfacial reactions, resulting in an electrolyte with unique functions suitable for lithium metal batteries. Here, we design a localized high-concentration electrolyte with a capsule-like solvation structure and non-flammable properties to obtain stable-cycle and safe lithium metal batteries. The weak coordination and dipole-dipole interactions of fluorinated ether molecules promote the self-assembly of capsule-like solvated sheaths, encapsulating cations/anions and polar solvent molecules within the solvation sheath, which improves the oxidative stability of the electrolyte system and promotes the reduction of anions. A high-quality solid electrolyte layer was derived at the electrode interfaces, leading to rapid Li+ transport and dendrite-free lithium deposition. Consequently, a Coulombic efficiency of 99.7 % is achieved, and the assembled Li||NCM811 battery exhibits a long cycle life of more than 400 cycles at 0.5C with a capacity retention of 83 %. This work provides a promising approach for developing non-flammable electrolytes suitable for high-voltage lithium metal batteries.
The localized high-concentration electrolyte can be achieved by diluting a high-concentration electrolyte with an anti-solvent, which inherits the original solvation structural characteristics and reduces harmful interfacial reactions, resulting in an electrolyte with unique functions suitable for lithium metal batteries. Here, we design a localized high-concentration electrolyte with a capsule-like solvation structure and non-flammable properties to obtain stable-cycle and safe lithium metal batteries. The weak coordination and dipole-dipole interactions of fluorinated ether molecules promote the self-assembly of capsule-like solvated sheaths, encapsulating cations/anions and polar solvent molecules within the solvation sheath, which improves the oxidative stability of the electrolyte system and promotes the reduction of anions. A high-quality solid electrolyte layer was derived at the electrode interfaces, leading to rapid Li+ transport and dendrite-free lithium deposition. Consequently, a Coulombic efficiency of 99.7 % is achieved, and the assembled Li||NCM811 battery exhibits a long cycle life of more than 400 cycles at 0.5C with a capacity retention of 83 %. This work provides a promising approach for developing non-flammable electrolytes suitable for high-voltage lithium metal batteries.
作者机构：
[Xu, Baomin; Wang, Xingzhu; Jiang, Bo; Wang, Deng; Wang, XZ; Peng, Wenbo; Su, Fei; Bao, Yuqi; Zhu, Peide; Wu, Chen; Zeng, Jie] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Xu, Baomin; Wang, Xingzhu; Jiang, Bo; Wang, Deng; Wang, XZ; Peng, Wenbo; Su, Fei; Bao, Yuqi; Zhu, Peide; Wu, Chen; Zeng, Jie] Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Peoples R China.;[Liang, Zheng; Pan, Xu] Chinese Acad Sci, Hefei Inst Phys Sci HIPS, Hefei 230031, Peoples R China.;[Xu, Baomin] Southern Univ Sci & Technol, Key Univ Lab Highly Efficient Utilizat Solar Energ, Shenzhen 518055, Peoples R China.;[Xu, Baomin] Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China.
通讯机构：
[Xu, BM ; Wang, XZ] S;[Zhang, Y ] H;Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Peoples R China.;Hong Kong Univ Sci & Technol Guangzhou, Sustainable Energy & Environm Thrust, Funct Hub, Guangzhou 511400, Guangdong, Peoples R China.
关键词：
Anti-solvent-free;In-situ analysis;Self-assembled molecule;Hole transporting materials;Perovskite solar cells
摘要：
Developing a facile method to fabricate high-quality perovskite films without employing anti-solvent techniques is crucial for the scalable production of perovskite solar cells (PSCs). However, fabricating formamidinium-based perovskite films without anti-solvent often results in films of inferior quality with high defect density, limiting the photovoltaic performance and long-term stability of derived PSCs. In this study, self-assembled monolayer (SAM) was employed as hole transport layers to promote the buried interface nucleation and growth of anti-solvent-free perovskite, which is particularly critical for such systems. We use the in-situ characterization techniques to in-depth understand the role of SAM binding in regulating nucleation and crystallization of perovskite precursors in anti-solvent-free systems. The resulting perovskite films exhibit stable crystal lattices and efficient charge carrier transfer. Consequently, the best-performing inverted structure devices achieve power conversion efficiencies of 25.60% and 23.53% on small-area (0.0736 cm 2 ) and large-area (1.0 cm 2 ) devices, respectively, which is among the highest efficiencies of anti-solvent-free PSCs.
Developing a facile method to fabricate high-quality perovskite films without employing anti-solvent techniques is crucial for the scalable production of perovskite solar cells (PSCs). However, fabricating formamidinium-based perovskite films without anti-solvent often results in films of inferior quality with high defect density, limiting the photovoltaic performance and long-term stability of derived PSCs. In this study, self-assembled monolayer (SAM) was employed as hole transport layers to promote the buried interface nucleation and growth of anti-solvent-free perovskite, which is particularly critical for such systems. We use the in-situ characterization techniques to in-depth understand the role of SAM binding in regulating nucleation and crystallization of perovskite precursors in anti-solvent-free systems. The resulting perovskite films exhibit stable crystal lattices and efficient charge carrier transfer. Consequently, the best-performing inverted structure devices achieve power conversion efficiencies of 25.60% and 23.53% on small-area (0.0736 cm 2 ) and large-area (1.0 cm 2 ) devices, respectively, which is among the highest efficiencies of anti-solvent-free PSCs.
期刊：
Energy & Environmental Science,2025年18(2):874-883 ISSN：1754-5692
通讯作者：
Zhang, Yong;Wang, Xingzhu;Xu, BM;Wang, XZ
作者机构：
[Xu, Baomin; Wu, Jiawen; Du, Yifan; Wang, Xingzhu; Jiang, Bo; Li, Zhitong; Liu, Zhixin; Zhang, Yong; Wang, Deng; Wang, XZ; Peng, Wenbo; Xu, Yintai; Zhu, Peide; Lei, Xia; Zeng, Jie] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Xu, Baomin; Wu, Jiawen; Du, Yifan; Wang, Xingzhu; Jiang, Bo; Liu, Zhixin; Zhang, Yong; Wang, Deng; Wang, XZ; Peng, Wenbo; Zhu, Peide; Zeng, Jie] Southern Univ Sci & Technol, Key Univ Lab Highly Efficient Utilizat Solar Energ, Shenzhen 518055, Peoples R China.;[Wang, Xingzhu; Wang, XZ; Zhou, Xianyong] Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Peoples R China.;[Wang, Xingzhu; Wang, XZ; Zhou, Xianyong] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Wang, Deng; Zeng, Jie] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong 999077, Peoples R China.
通讯机构：
[Xu, BM ; Zhang, Y; Wang, XZ] S;[Wang, XZ ] U;Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;Southern Univ Sci & Technol, Key Univ Lab Highly Efficient Utilizat Solar Energ, Shenzhen 518055, Peoples R China.;Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Peoples R China.
摘要：
Optimization of buried interfaces is crucial for achieving high efficiency in inverted perovskite solar cells (PSCs), owing to their role in facilitating hole transport and passivating the buried interface defects. While self-assembled monolayers (SAMs) are commonly employed for this purpose, the inherent limitations of single SAMs, such as fixed material structure and energy levels, hinder their adaptability and further efficiency enhancement across diverse compositions. In this study, we present an effective strategy of blending with SAMs with varying dipole moments to modulate the energy levels and hole transport properties, leading to enhanced charge transport characteristics and suppression of energy losses at buried interfaces. The intrinsic mechanisms of energy level modulation on the device performance are further investigated through theoretical simulations. Ultimately, small-area (0.0736 cm 2 ) inverted PSCs with a 1.56 eV bandgap achieve a champion power conversion efficiency (PCE) of 26.28% (certified efficiency of 25.80%), while large-area devices (1.1 cm 2 ) demonstrate an efficiency of 24.65%. Moreover, the energy-level-tunable SAM materials exhibit applicability across various PSCs with different preparation methods and bandgaps, achieving efficiencies of 24.44% for anti-solvent-free (1.56 eV) and 19.03% for wide-bandgap (1.85 eV) perovskite solar cells, respectively. Notably, devices employing these SAM materials demonstrate excellent photostability, maintaining over 95% of initial efficiency after 1000 hours of operation at the maximum power point (MPP).
摘要：
Many thermal processes, described by distributed parameter systems (DPSs), work in a large-scale operation region. In each region, it has special nonlinear dynamics due to specific relative position with heat sources. Achieving a global dynamic model of this kind of processes is extremely difficult due to different local dynamic features. Here, a spatial graphic relation-based spatiotemporal fuzzy modeling method is proposed to reconstruct the model of the large-region DPSs. First, a spectral clustering strategy is developed for region division, where the large-scale spatiotemporal region is divided into several local regions. For each local region, the spatial basis functions (SBFs) are extracted to represent the energy exchange on space. To reflect the global spatial feature, an incremental fuzzy fusion approach is designed and integrates these SBFs to form a global spatial function. Then, the temporal dynamics is obtained by projecting the spatiotemporal data on this global spatial function and characterized by a fuzzy model. Integrating the global spatial function and temporal model, the spatiotemporal model is constructed for the process with large-scale operation region. Using theoretical analysis and experiment, modeling ability of the proposed model is demonstrated effectively.
Many thermal processes, described by distributed parameter systems (DPSs), work in a large-scale operation region. In each region, it has special nonlinear dynamics due to specific relative position with heat sources. Achieving a global dynamic model of this kind of processes is extremely difficult due to different local dynamic features. Here, a spatial graphic relation-based spatiotemporal fuzzy modeling method is proposed to reconstruct the model of the large-region DPSs. First, a spectral clustering strategy is developed for region division, where the large-scale spatiotemporal region is divided into several local regions. For each local region, the spatial basis functions (SBFs) are extracted to represent the energy exchange on space. To reflect the global spatial feature, an incremental fuzzy fusion approach is designed and integrates these SBFs to form a global spatial function. Then, the temporal dynamics is obtained by projecting the spatiotemporal data on this global spatial function and characterized by a fuzzy model. Integrating the global spatial function and temporal model, the spatiotemporal model is constructed for the process with large-scale operation region. Using theoretical analysis and experiment, modeling ability of the proposed model is demonstrated effectively.
摘要：
The oxygen evolution reaction (OER) is a pivotal process in numerous renewable energy conversion technologies. However, its sluggish intrinsic kinetics and intricate transfer process impede the efficient conversion of energy. Activating the lattice oxygen mechanism (LOM) is of paramount importance to break through the theoretical scaling relationship and boost the oxygen evolution catalytic activity. In this contribution, N and F are successfully introduced into Co(3)O(4) simultaneously as heteroatoms via a controllable plasma strategy to modulate the covalency property of metal-oxygen. Theoretical simulations and experiment results demonstrated that the covalency of the cobalt-oxygen bond is significantly enhanced under the synergistic effect of N and F, successfully triggering the LOM pathway and facilitating the OER process. The N, F-Co(3)O(4) composite displays an impressive OER performance, exhibiting a low overpotential of 254mV at 10mA cm(-2) and remarkable stability at 20, 150, and 400mA cm(-2). In addition, The N, F-Co(3)O(4) also exhibitsa low overpotential of 285mV at 20mA cm(-2) in 1 m KOH + 0.5m NaCl solution, and remarkable performance on overall water splitting. This work offers profound insights into the OER mechanism and a crucial strategy for enhancing the electrocatalytic activity of spinel oxides.
期刊：
Analog Integrated Circuits and Signal Processing,2025年122(2):1-11 ISSN：0925-1030
通讯作者：
Chen, WG
作者机构：
[Chen, Wenguang; Wen, Shuang; Liu, Zhijian; Zheng, Liang] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, WG ] U;Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
关键词：
Defects;Non-destructive testing;Pulsed eddy current testing;Pulsed power supply;Clamp circuits
摘要：
Pulsed Eddy Current Testing (PECT) is a hotspot for non-destructive testing of metallic materials. As a key part of the system, the performance of the excitation source will directly affect the results. A new pulse power supply circuit is proposed to overcome the problems of long turn-off time, no constant current control, large volume, and low power of the excitation source in the existing PECT method for material defects. It uses a combination of linear regulated power supply and switched power supply to realize a compound circuit topology of constant current and constant voltage clamp. Then, the stability and rapidity of the excitation system are verified through simulation experiments and prototype demonstration. The amplitude of the pulsed power supply is adjustable within 20A, with an inaccuracy under 1%, and it is able to turn off at high speed with an edge fall time of nanoseconds. Finally, the prototype is used to simulate the detection of aluminum metal defects, the peak voltage of the detection coil can accurately identify different defect depths with high resolution. Its results show that the design method is feasible and has excellent performance.
期刊：
ACS Energy Letters,2025年10(XXX):2770–2777 ISSN：2380-8195
通讯作者：
Li, YL;Wang, XZ;Yang, XQ
作者机构：
[Li, Yunlong; Chen, Huiwen; Zhu, Ziyao; Yu, Mingrui; Zhang, Yang; Zhao, Bo; Li, Yang; He, Yang; Gao, Sheng; Li, YL] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China.;[Wang, Xingzhu; Wang, XZ; He, Yang] Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Peoples R China.;[Wang, Xingzhu; Wang, XZ; He, Yang] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Stolterfoht, Martin] Chinese Univ Hong Kong, Elect Engn Dept, Hong Kong 999077, Peoples R China.;[Yang, Xueqing; Yang, XQ] Soochow Univ, Collaborat Innovat Ctr Radiol Med Jiangsu Higher E, Sch Radiat Med & Protect, State Key Lab Radiat Med & Protect, Suzhou 215123, Peoples R China.
通讯机构：
[Wang, XZ ] U;[Yang, XQ ] S;[Li, YL ] C;Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China.;Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Peoples R China.
摘要：
Three-dimensional metal halide perovskites (3D-MHPs) have emerged as potential semiconductors for direct-conversion X-ray detectors. However, excessive ion migration in 3D-MHPs compromises device stability, hindering practical deployment. While perovskite heterojunctions have been explored to suppress ion migration, their effectiveness are often limited by challenges in fabricating high-quality heterojunctions, resulting in suboptimal charge collection compared to individual perovskite crystals. In this work, a liquid-phase interfacial array-epitaxial growth method was developed to construct high-quality MAPbBr 3 /MAPbI 3 heterojunctions for direct X-ray detectors. The heterojunction crystal exhibit a serrated, ultrathick transition region that enhances X-ray response by increasing the interfacial contact area between MAPbBr 3 and MAPbI 3 . Consequently, the fabricated detectors demonstrate stable operational performance, a high sensitivity of 0.99 × 10 6 μC Gy air –1 cm –2 , and an ultralow detection limit of 0.56 nGy air s –1 . Furthermore, the built-in electric field enables self-powered X-ray detection at 0 V bias, achieving a sensitivity of 1.16 × 10 3 μC Gy air –1 cm –2 .
摘要：
INTRODUCTION: The interaction between endothelial cells can regulate hemostasis, vasodilation, as well as immune and inflammatory responses. Excessive loading on the endothelial cells leads to endothelial damage and endothelial barrier dysfunction. Understandingandmasteringthe dynamic nature of cell-cell rupture plays a crucial role in exploring the practical applications related to tumor destruction, vascular remodeling, and drug delivery byemploying cavitation-induced damage tosoft tissues. METHODS: To investigate the damage mechanisms of endothelial cellular networks under ultrasound cavitation, we developed a model of junction rupture in cellular networks based on the assumption that the process of intercellular rupture is irreversible when ultrasound-mediated forces exceed the damage threshold, whereas intercellular junctions have reversible behavior before rupture. Simulations using the strain accumulation method show that stress and strain exhibit complex nonlinear dynamic behavior. Ultrasonic cavitation damage was tested and evaluated on human umbilical vein endothelial cells. RESULTS: The results indicated that the cellular network damage was positively correlated with force amplitude and pulse frequency and was negatively correlated with driving frequency. The time lag and the internal force of cellular junctions have an important influence on the resistance to damage of the cellular network due to external forces. The damage experiment based on ultrasonic cavitation confirmed the effectiveness of the proposedmodel. CONCLUSIONS: The model provided a platform for understanding the damage mechanism of endothelial tissues and ultimately improving options for their prevention and treatment.
期刊：
Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering,2025年 ISSN：0954-4100
通讯作者：
Nie, L
作者机构：
[Nie, L; Nie, Liang] Univ South China, Sch Elect Engn, 28 Changsheng West Rd, Hengyang 421001, Peoples R China.;[Wang, Hui] Liaocheng Univ, Sch Math Sci, Liaocheng, Peoples R China.;[Nie, Wei] Army Mil Transportat Univ, Zhenjiang Naval Acad, Zhenjiang, Peoples R China.
通讯机构：
[Nie, L ] U;Univ South China, Sch Elect Engn, 28 Changsheng West Rd, Hengyang 421001, Peoples R China.
摘要：
This paper presents an observer-based switched linear parameter-varying (LPV) fault-tolerant control approach for missile autopilot systems that are vulnerable to actuator failures, input saturation, amplitude-bounded disturbances and model uncertainties. By considering input constraint as modeling parameters, the nonlinear missile dynamics are constructed as a switched LPV system, and each LPV subsystem corresponds to a specific actuator fault case. The general persistent dwell-time (PDT) constraint is adopted to restrict switching behaviors among those LPV subsystems, which covers the commonly employed average dwell time (ADT) or dwell time (DT) as special cases. The stability and L infinity performance of the established uncertain switched LPV system are guaranteed by designing a piecewise parameter-dependent polytopic controller and a state-observer, which allow for amplitude-bounded disturbances in contrast to the existing studies that focus on energy-bounded disturbance attenuation. The effectiveness and advantage of the proposed switched LPV fault-tolerant control method are illustrated through numerical simulations.
期刊：
Energy & Environmental Science,2025年 ISSN：1754-5692
通讯作者：
Wang, Xingzhu;Xu, BM;Wang, XZ;Liu, YS
作者机构：
[Xu, Baomin; He, Siru; Wang, Xingzhu; Jiang, Bo; Liu, Zhixin; He, Jiang; Wang, Deng; Wang, XZ; Wang, Jiangfeng; Bao, Yuqi; Zhu, Peide; Song, Zonglong; Zeng, Jie] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Xu, Baomin; Wang, Xingzhu; Wang, XZ] Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Xu, Baomin; Wang, Xingzhu; Wang, XZ] Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China.;[Wang, Xingzhu; Wang, XZ] Shenzhen Putai Technol Co Ltd, Shenzhen 518110, Peoples R China.;[Wang, Xingzhu; Wang, XZ] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Liu, YS ] N;[Xu, BM ; Wang, XZ ; Wang, XZ] S;Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China.
摘要：
The development of efficient and stable wide-bandgap (WBG) bromine–iodine halide perovskites (Br > 20%) is crucial for enhancing the performance of tandem solar cells. Nonetheless, phase separation of I–Br in WBG perovskites under illumination and heating significantly hinders the advancement of tandem devices. This phenomenon is primarily attributed to the uneven spatial distribution of halide ions in WBG films. Moroxydine hydrochloride was introduced into 1.85 eV I–Br mixed WBG perovskite films, effectively optimizing the crystallization dynamics of the perovskite and improving the film stability. Through this approach, a 1.85 eV WBG perovskite solar cell (PSC) was successfully fabricated, achieving a power conversion efficiency (PCE) of 18.76%, an open-circuit voltage ( V OC ) of 1.387 V, and remarkable operational stability. When applied to perovskite–organic tandem solar cells, this method led to devices with a PCE of 25.98% and a V OC of 2.210 V, setting a new record for the highest V OC reported to date.
摘要：
Undersampled magnetic resonance imaging (MRI) aims at reconstructing high-quanlity MR images from undersampled measurements, which plays a crucial role for accelerated MRI. Deep learning methods have shown great superiority in undersampled MRI. However, most of these approaches reconstruct MR images in the image domain, ignoring frequency characteristics. This leads to conflicting information between different frequencies, making it difficult to reconstruct a clearly structured image. In this work, we present a novel wavelet domain based dynamic graph attention network, called FDGANet, for undersampled MRI reconstruction. It employs a U-shaped backbone network that consists of high-frequency and low-frequency branches to reconstruct MR images in different frequency sub-bands. Based on the non-local self-similarity at low frequencies of images, we design a multi-head dynamic graph attention module (MDGA) to mine the non-local features of MR images. The proposed dynamic graph attention mechanism treats feature patches as nodes, dynamically allocating neighbor nodes of each query node to construct long-range correlations. In addition, we introduce a texture enhancement module based on gradient operators to preserve the rich edge and texture details at high-frequency features. To address the reconstruction inconsistency in different frequency bands, we further propose a cross-frequency differential-aware fusion module (CDFM). It facilitates the complementary integration of high-frequency and low-frequency features, improving the representation capability across frequency bands and mitigating information loss. Extensive experiments on multiple datasets, including clinical datasets, show that our model has advantages over existing advanced MRI reconstruction methods.
Undersampled magnetic resonance imaging (MRI) aims at reconstructing high-quanlity MR images from undersampled measurements, which plays a crucial role for accelerated MRI. Deep learning methods have shown great superiority in undersampled MRI. However, most of these approaches reconstruct MR images in the image domain, ignoring frequency characteristics. This leads to conflicting information between different frequencies, making it difficult to reconstruct a clearly structured image. In this work, we present a novel wavelet domain based dynamic graph attention network, called FDGANet, for undersampled MRI reconstruction. It employs a U-shaped backbone network that consists of high-frequency and low-frequency branches to reconstruct MR images in different frequency sub-bands. Based on the non-local self-similarity at low frequencies of images, we design a multi-head dynamic graph attention module (MDGA) to mine the non-local features of MR images. The proposed dynamic graph attention mechanism treats feature patches as nodes, dynamically allocating neighbor nodes of each query node to construct long-range correlations. In addition, we introduce a texture enhancement module based on gradient operators to preserve the rich edge and texture details at high-frequency features. To address the reconstruction inconsistency in different frequency bands, we further propose a cross-frequency differential-aware fusion module (CDFM). It facilitates the complementary integration of high-frequency and low-frequency features, improving the representation capability across frequency bands and mitigating information loss. Extensive experiments on multiple datasets, including clinical datasets, show that our model has advantages over existing advanced MRI reconstruction methods.
关键词：
contact resistance;AuxIny alloy;GeSe;photodetector;MIGS (metal-induced gap states);DIGS (disorder-inducedgap states)
摘要：
Metal-semiconductor contact plays a significant role in devices such as transistors, photoemitters, and photodetectors. Here, the Au(x)In(y) alloy contact gives a state-of-the-art low R(C) (contact resistance) in GeSe devices. The R(C) of GeSe-Au(x)In(y) is measured to be 25 kΩ μm under channel carrier concentration around p = 2.490 × 10(10) cm(-2). This low R(C) is ascribed to a small barrier height of 16 meV. Our density functional theory calculation found the formation of a high conductive metallic GeSe-Au(x)In(y) interface due to indium doping, which screens the possible interface disorder-induced gap states and metal-induced gap states that are observed when using pure In (indium) or Au (gold) metal. The GeSe-Au(x)In(y) photodetectors show enhanced photoresponsivity with a specific photoresponsivity of 6.46 × 10(4) A/W and a detectivity of 8.9 × 10(13) Jones (at 450 nm wavelength). Our study is helpful in designing high-performance GeSe-based devices.
作者机构：
[Xu, Baomin; Wang, Xingzhu; Zhang, Jiyao; Liu, Zhixin; Wang, Deng; Wang, XZ; Wang, Jiangfeng; Xu, Yintai; Zhu, Peide; Xu, Jianpeng; Zhou, Xianyong; Zeng, Jie; Zhang, Yong] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Ying, Lei; Zhu, Chunguang; Ying, L] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.;[Yan, Lei; Xu, Yintai; Yan, L] Xiangtan Univ, Sch Phys & Optoelect, Xiangtan 411105, Peoples R China.;[Wang, Xingzhu] Shenzhen Putai Technol Co Ltd, Shenzhen 518110, Peoples R China.;[Wang, Xingzhu] Univ South China, Engn & Res Ctr Integrated New Energy Photovolta &, Hengyang 421001, Peoples R China.
通讯机构：
[Xu, BM ; Ying, L ; Wang, XZ] S;[Yan, L ] X;Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.;Xiangtan Univ, Sch Phys & Optoelect, Xiangtan 411105, Peoples R China.
关键词：
Non-fullerene acceptors;Ester-based quinoxaline;Ternary organic solar cells;Energy loss;High efficiency
摘要：
The ternary strategy has been recognized as an effective approach for boosting the power conversion efficiency (PCE) of organic solar cells (OSCs). For ternary devices, selecting an appropriate third component is critical to ensure that both the photocurrent and voltage outputs of OSCs are not compromised. In this study, we present the use of an ester-based quinoxaline core non-fullerene acceptor (QEIP-4Cl) for the fabrication of ternary devices, which demonstrate enhanced absorption spectra and beneficial cascading LUMO energy level arrangement when paired with the PM6:L8-BO blend. Compared to the binary system, the ternary blend system exhibits superior thin-film phase separation and better suppression of non-radiative recombination, resulting in a reduced energy loss (E loss ) value. Moreover, by prolonging exciton lifetime, promoting charge carrier migration and suppressing charge recombination to facilitate improved J SC in OSCs. With the combined enhancement of V OC and J SC , OSCs achieve an impressive efficiency of 19.27 %. This research demonstrates the effectiveness of the ternary strategy in enhancing the performance of OSCs. The careful selection of the third component contributes to improved absorption, energy level alignment, and overall efficiency, making it a notable advancement in organic solar cell technology.
The ternary strategy has been recognized as an effective approach for boosting the power conversion efficiency (PCE) of organic solar cells (OSCs). For ternary devices, selecting an appropriate third component is critical to ensure that both the photocurrent and voltage outputs of OSCs are not compromised. In this study, we present the use of an ester-based quinoxaline core non-fullerene acceptor (QEIP-4Cl) for the fabrication of ternary devices, which demonstrate enhanced absorption spectra and beneficial cascading LUMO energy level arrangement when paired with the PM6:L8-BO blend. Compared to the binary system, the ternary blend system exhibits superior thin-film phase separation and better suppression of non-radiative recombination, resulting in a reduced energy loss (E loss ) value. Moreover, by prolonging exciton lifetime, promoting charge carrier migration and suppressing charge recombination to facilitate improved J SC in OSCs. With the combined enhancement of V OC and J SC , OSCs achieve an impressive efficiency of 19.27 %. This research demonstrates the effectiveness of the ternary strategy in enhancing the performance of OSCs. The careful selection of the third component contributes to improved absorption, energy level alignment, and overall efficiency, making it a notable advancement in organic solar cell technology.
